SmogRank / History / City race
Cities in Brazil, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Brazil for PM2.5 over the 30 days to 6 Nov 2025: Guarapari 28.7 µg/m³, Anchieta 22.0 µg/m³ and Nova União 21.3 µg/m³.
- 1GuarapariEspírito Santo28.7
- 2AnchietaEspírito Santo22.0
- 3Nova UniãoMinas Gerais21.3
- 4TimóteoMinas Gerais14.8
- 5Ribas do Rio PardoMato Grosso do Sul13.7
- 6Rio ClaroSão Paulo13.4
- 7TubarãoSanta Catarina12.9
- 8BetimMinas Gerais12.8
- 9GuarapuavaParaná12.4
- 10PaulíniaSão Paulo12.0
- 11ItabiraMinas Gerais12.0
- 12CampinasSão Paulo11.9
- 13Coronel FabricianoMinas Gerais11.7
- 14Ribeirão PretoSão Paulo11.5
- 15ParacatuMinas Gerais11.3
- 16São PauloSão Paulo11.2
- 17JundiaíSão Paulo11.2
- 18IbiritéMinas Gerais10.8
- 19LimeiraSão Paulo10.7
- 20ColomboParaná10.6
+ 22 more cities, the next at 10.6 µg/m³
Not counted on this day, too few days measured: Camaçari since 5 Nov 2025, Três Lagoas since 30 Oct 2025, Maringá since 27 Oct 2025 and 5 more cities.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.